Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3831
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
WN 3831 · SMF → SNA
departs 11:50 AM PT · arrives 1:20 PM PT
Forecast issued Sat 12:00 AM ET · 63h before departure
Watch this flight
Other days
Today 13%
Sun 10/4 16%
Mon 10/5
Fri 10/9 14%
Odds over time
Arrive at SNA more than 15 minutes late?
12%
chance · ±0 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
12%
Leave 15+ late
16%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at SNA more than 15 minutes late?
Calm-weather odds: 11% · changed – in 24h
–
12%
Yes 12%
No 88%
Leave SMF more than 15 minutes late?
Calm-weather odds: 17% · changed – in 24h
–
16%
Yes 16%
No 84%
Arrive at SNA more than an hour late?
Calm-weather odds: 2% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 100%
How late will it get to SNA?
On time or early
88%
15–30 min late
4%
30 min–1 hour late
6%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↓
Mostly benign weather forecast at SNA
↓
Mostly benign weather forecast at SMF
Weather at each end
SMF (origin)
Gusts 6 kt Ceiling none (clear) Visibility 10+ mi Precip none
SNA (destination)
Gusts 17 kt Ceiling none (clear) Visibility 10+ mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.